Multi-band frequency multiplier

Abstract

A multi-band frequency multiplier configured to generate frequencies and multiplied frequencies in an integrated system. The multi-band frequency multiplier includes a multi-band multiplier core with a multiplier core differential amplifier configured to receive a multiplier input signal. A switchable load impedance connects to the multiplier core differential amplifier, and includes n multiplier sections. Each multiplier section includes a section impedance and a section switch. The multiplier core differential amplifier generates an output signal having a frequency substantially equal to k times the input frequency in a range of a selected one of n critical frequencies when a selected one of the section switches corresponding to the selected one of the n critical frequencies is triggered.

Description

TECHNICAL FIELD[0001]The present invention relates to frequency multipliers, and more particularly, to multi-band frequency multipliers.BACKGROUND[0002]Frequency multipliers are devices that multiply the frequency of an input signal by a desired number. Frequency multipliers are typically used in radio frequency (“RF”) and microwave test instruments and communications systems to extend the frequency range of lower frequency sources. The multiplied signals may be generated using non-linear devices, which may include either passive (such as Schottky diodes) or active (such as Field Effect Transistors or Bipolar Junction Transistors) devices. Diodes generally operate at higher frequencies than transistors and are the preferred choice for the highest frequency multipliers. However, diodes typically require higher power to operate and have higher conversion loss. Transistors, on the other hand, are convenient to use since they have a gain and can generate multiplied frequencies at lower ...

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